福建中立恒自动化设备有限公司

1．输入/输出单元

输入/输出单元通常也称I/O单元或I/O模块，是PLC与工业生产现场之间的连接部件。

PLC通过输入接口可以检测被控对象的各种数据，以这些数据作为PLC对被控制对象进行控制的依据；同时PLC又通过输出接口将处理结果送给被控制对象，以实现控制目的。

由于外部输入设备和输出设备所需的信号电平是多种多样的，而PLC内部CPU的处理的信息只能是标准电平，所以I/O接口要实现这种转换。

I/O接口一般都具有光电隔离和滤波功能，以提高PLC的抗干扰能力。另外，I/O接口上通常还有状态指示，工作状况直观，便于维护。

PLC提供了多种操作电平和驱动能力的I/O接口，有各种各样功能的I/O接口供用户选用。I/O接口的主要类型有：数字量（开关量）输入、数字量（开关量）输出、模拟量输入、模拟量输出等。

常用的开关量输入接口按其使用的电源不同有三种类型：直流输入接口、交流输入接口和交/直流输入接口。

常用的开关量输出接口按输出开关器件不同有三种类型：是继电器输出、晶体管输出和双向晶闸管输出。

继电器输出接口可驱动交流或直流负载，但其响应时间长，动作频率低；而晶体管输出和双向晶闸管输出接口的响应速度快，动作频率高，但前者只能用于驱动直流负载，后者只能用于交流负载。

PLC的I/O接口所能接受的输入信号个数和输出信号个数称为PLC输入/输出（I/O）点数。I/O点数是选择PLC的重要依据之一。当系统的I/O点数不够时，可通过PLC的I/O扩展接口对系统进行扩展。

2．通信接口

PLC配有各种通信接口，这些通信接口一般都带有通信处理器。

PLC通过这些通信接口可与监视器、打印机、其它PLC、计算机等设备实现通信。

PLC与打印机连接，可将过程信息、系统参数等输出打印；与监视器连接，可将控制过程图像显示出来；与其它PLC连接，可组成多机系统或连成网络，实现更大规模控制。

与计算机连接，可组成多级分布式控制系统，实现控制与管理相结合。远程I/O系统也必须配备相应的通信接口模块。

3．智能接口模块

智能接口模块是一独立的计算机系统，它有自己的CPU、系统程序、存储器以及与PLC系统总线相连的接口。

它作为PLC系统的一个模块，通过总线与PLC相连，进行数据交换，并在PLC的协调管理下独立地进行工作。

PLC的智能接口模块种类很多，如：高速计数模块、闭环控制模块、运动控制模块、中断控制模块等。

WIKA Model S5550/4 Bimetal Thermometer Back Moted Adjustable Dial 120°C

SPEEDAIRE 4ZL60 Compressed Air Lubricator 1" 275 CFM 250psi / 17 bar

Pack of 5 pieces Excelock SS316 Needle Valve 1/2" NPT F X F WP 6000 PSI

PG7604-15407 REXROTH Compressed Air Lubricator 1-1/4" NPT PG-7604-15407

DUKIN BESKO HDM 03 /1-3-E-2-L Joystick Hydraulic Control Valve 3/8"

DUKIN BESKO HDM 03 /1-3-E-1-L Joystick Hydraulic Control Directional Valve 3/8"

ASCO 8290A386 2/2 NC 1" NPT Pressure Actuated Bronze Angle Seat Valve

TERMOMETRO Industrial Temperature Indicator with Switch 0-150 deg.C 6" dial 3m

TAKASAGO Clean Valve NTV-2-1/4 PTFE Solenoid Valve 2-Way NC 24V DC 1/4" 200 KPA

Norgren Super-X X4125500 5/2-Way 1/8" Pneumatic Solenoid Valve 120/60 AC

Parker PXC 3/2 Limit Switch PXC-K21106 3/2-Way NC Whisker / Spring 4 mm PXC-K21

REXROTH SC-700 PD-020031-500 'D' Pilotair Special Purpose Valve R431007808

SIEMENS Model 91-HF Air Filter Regulator 0-120 psi 1/4" NPT Max 150 psi 91HF

Parker 931974 Filtration Clogging Indicator E2 Electrical  Visual

CAMOZZI MX Series MX3-3/4-FR2004 Filter-Regulator FR Combination G3/4"

Rexroth 0493832506 3/2 NC Pilot valve PILOT-15MM-IP67-M8-350MM 24V DC 2.2W

Burkert 0311 00069387 3/2 NC G1/4 Direct Acting Solenoid Valve 230V 50 Hz w M/O

COMPAIR 98650-143 Condensate Drain Solenoid Valve 110V 50-60 Hz 0-15 bar

Ingersoll Rand 22228019 REV A 3 Way Solenoid Valve 1/4" 120V 60 Hz 232 psi

ASCO WT8551A001MS 3/2 5/2 NAMUR Spool Solenoid Valve 1/4" NPT 120/60 AC

HAWE Hydraulik Type DRH DRH2 Releasable Twin check Valve G3/8" BSPP

Rexroth R900702544 HSE 10 F10B001-3X/V00 Hydraulic Valve Manif Plate

Humphrey V062E1 3 10 20 35 3-Way 1/4" Vacuum Solenoid Valve 24V DC 0-29 " Hg

Humphrey V062E1 3 11 20 35 3-Way Solenoid Valve 1/4" 24V DC 0-125 PSI

Humphrey V125E1 3 10 20 35 Vacuum Solenoid Valve 0-29" HG 24V DC

Humphrey 125E1 3 10 20 35 Solenoid Valve 1/4" 24V DC 0-125 psi

KOGANEI 062E1-37W Air Solenoid Valve 3-Way 1/4" AC 110V / 60 Hz 0-0.9 Mpa

SMC VT325 Series VT-325-021T-X39 3 way Pneumatic Solenoid Valve 1/4" 100V AC

TRAFAG Type 471.2323 ISNT 11015 Temperature Control Switch 20..110 deg. C

NIHON SEIKI BN-2510-8 NISCON Compact it FRL Filter Regulator Lubricator

BOSCH 0820023981 5/2 1/4" Pneumatic Directional Valve 1824210243 Coil 24V DC

BOSCH 0820014035 5/2 Way Pneumatic Directional Solenoid Valve 230/60 AC

SMC Pneumatics AN900-20 Pneumatic Exhaust Silencer / Muffler 2" NPT

Rexroth 5500280000 550-028 MOD. 3 3/2 NC Pneumatic Directional Valve

MST21 SPIRAX SARCO 1/2" SS Balanced Pressure Thermostatic Steam Trap

BURKERT Type 0255 53188 Direct Acting Solenoid Valve 2/2-way NC G1/4 230/50 AC

HAWE Hydraulik MVG Series MVGC 14 M Pressure Limiting Valve G1/4 MVGC14M

HERION 3726 Hazardous Duty application solenoid coil 24V DC 13.6W 18" leads

IMI Herion Norgren 2636000 5/2 Way G1/4 Inline Spool Solenoid Valve 110V 50 Hz

71215SN2MF00N0D100C2 Parker Skinner 2 Way NC SS Solenoid Valve 1/4" NPT 24V DC

COMATROL VME08-E-3-L Hydraulic Relief Valve 3/4" 70-315 bar

FESTO Solenoid valve MDH-5/2-D-1-S-FR-M12-C 533761

ASCO SCX8210D002 Solenoid Valve 1/2" With Model 720 Timer 230V AC

ASCO Red-Hat 8320G55 3-Way 1/8 in. Stainless Steel Solenoid Valve 120/60 AC

HAWE Hydraulik Type MV MVE5C Pressure Limiting Valve Screw-in for Manif Mot

Parker 7131Z002N0C111P3 Pneumatic Solenoid Valve 120/60 AC Max 125 psi

HYDRAFORCE Valve SV08-21-6T-N-115AG 2-Way Normally Open 115V AC 207 bar

FUJIKURA RR-8-2 Air Pilot Super Precision Air Relay 0.014~0.84 Mpa Rc 1/4

COMATROL 92.25.012 1/2" Hydraulic Cartridge Valve

SKINNER H935LB2150 5/2-Way 1/4" NPT Solenoid Valve 120/60 AC 30-150 psi

IMI Norgren Buschjost 8498819.8001 2/2 NC Solenoid Valve 1/2" 230V AC 16 bar

TAIYO HERION P3HC-03E 3/2-Way Air Pilot Pneumatic Directional Valve 3/8"

DIAL Instruments FLOW-ON series Model FF84 FF-84 Paddle Flow Switch upto 10"

Mc Donnel  Miller FSW-254 Paddle Type General Purpose Liquid Flow Switch

McDonnell  Miller FS4-3T3-1 Line Moted Flow Switch 1" NPT Max 150 psi / 300°F

KOB Instruments Type PPS-3105 Polysulfbi-directional Paddle Flow Switch

ENDRESS HAUSER PMC131A15F1D10 Pressure Transmitter 0-100 mbar 1/2"

KETA Hydraulics LSV2-08-2NCRP 2/2 NC Hydraulic Cartridge Valve G1/4 220 RAC

FLUID TEAM 2/2 NC Hydraulic Cartridge Valve G1/4 24V DC

HONEYWELL T7560B1024 Digital Wall module DIGITAL HMI FOR ROOM CONTOL

NORIS Typ TH31-01 Stainless-steel stick-in sensor 40...120 deg. C 100 mm

Norgren Herion 2623079 3/2 5/2-Way Solenoid Actuated NAMUR Spool Valve no Coil

IMI Herion 9710000 3/2 5/2-Way Solenoid Actuated NAMUR Valve 12V DC 24/50 AC

IMI Herion 9710000 3/2 5/2-Way Solenoid Actuated NAMUR Valve 230V AC

XUAH0515S Telemecanique Sensors photo-electric sensor

Burkert Type 5281 186617 Solenoid Valve 2/2 NC 110V 50-60 Hz G1/2" 0.2-16 bar

VAN AIR 26-10433 E200-600-C Replacement Spare Filter Element

PEPPERL FUCHS Type LFL LFL2-BK-U Liquid Level Switch Rod float

PEPPERL FUCHS Type LFL LFL3-CK-U-CSM3 Cylindrical Float Switch Cable 3m

PEPPERL FUCHS Type LFL LFL2-CK-U-PUR5-RSC Cylindrical Float Switch Cable 5m

FESTO LFU-1 Part No. 10495 Screw-in Filter Silencer G1" 0...16 bar 12500 l/min

ASCO Red-Hat SDX8215G030V23053 3/4" Low Press. Gas Solenoid Valve 24V DC 3 psi

Sensata Cynergy 3 SSF212 PCB Mot Stainless Steel Float Switch RS 454-9105

Dwyer Model 668-1 Differential Pressure Transmitter 0-0.25"w.c. 24V DC 4..20 mA

ASCO 8211D095 2/2 NC Solenoid Valve 3/4" 120/60 AC 7 kg/cm2

Buschjost 8240380.9100 GEA WESTFALIA 0018-7392-600 Solenoid Valve G3/4" 230V AC

Norgren M/20132/122 3/2-Way G1/4 Pneumatic Directional Solenoid Valve 24V DC

NORGREN V085516A-B300A 5/2-Way M5 Pneumatic Solenoid Valve 24V DC

SMC VT325-033DL-Q 3-port Direct poppet operated solenoid valve 3/8" 110/60 AC

NIPPON LINIAX Compact Pressure Transmitter POT-3 0~ 50 Kpa 4..20Ma DC24V 1/4"

Fairchild Model 20 Catalog no. 20722 Pneumatic Volume Booster 1:2 ratio 1/4" NPT

NIPPON LINIAX Compact Pressure Transmitter POT-3 0~ 200 Kpa 4..20Ma DC24V 1/4"

S HYDRAULICS DCCC XXN Hydraulic Directional Cartridge Valve DCCCXXN

NIPPON LINIAX Compact Pressure Transmitter POT-3 0~ 100 Kpa 4..20Ma DC24V 1/4"

CKD HO-03-215 Fuel Oil Solenoid Valve 200V AC 50/60 Hz 3/8" 1.5 Mpa

HAWE Hydraulik MVS Series MVS52ER Pressure Limiting Valve G3/8" 160 bar

Parker VA15 P/N 8204130805 5/2 Way G1/8 Panel Mot Pneumatic Toggle Valve

REXROTH BOSCH 0820023026 5/2 Way G1/4 Pneumatic Solenoid Valve 24V DC

Norgren 11-002-201 Precision Air Regulator 1/4" NPT Inlet 400 psi Out 125 psi

SKF VectoLub AC-3485-C2 Lubrication Nozzle Spray block Wide Jet

Rockwell Automation EI/1100IHCQ Vibration Monitoring Accelerometer ENTEK 81012

SKF VectoLub AC-4529-C2 Lubrication Nozzle Spray block Circular Fine Jet

GEMS Sensors Pressure Sensor 2200DAB2501A3UA 25 bar Output 1-11 V DC G1/4

SENSOCON 211-Z024M-1 Differential Pressure Transmitter -12-0-12 mm W.C.

SAGINOMIYA SEV-603BXF Flourocarbon Solenoid Valve 3/8" Flare AC110V 2.46 Mpa

S Hydraulics RPEC-LNN Pilot-operated balanced piston relief valve manif FEU

QUINCY 146175-2 Pressure Regulating Valve CASH VALVE 1/4 TYPE CP set 150 psi

Parker K085902553 Speedking Replacement Solenoid Coil 120V AC 50/60Hz

DAMCOS SA-G01-H3X-C230-31ES Hydraulic Directional Control Valve 230V AC

Rexroth 3631720000 Toggle Switch Pneumatic Modular Valve

Parker Lucifer 131VS8775 3/2 Way 1/4" Stainless Steel Direct Acting Sol Valve

Asco Joucomatic 26490026 Poppet Type Pneumatic Valve Body 4/2 Way G1/4"

Parker DPG-15 FINITE Pneumatic Differential Pressure Gauge for H Series Housing

SMC IW Series Filter Regulator IW213-02B-ST-X28 1/4" port 0.02 to 0.3 Mpa

ASCO SCE262C020 2-Way 1/4" Solenoid Valve 240/60 0-25 bar Air/ Gas / Water

SMC IL211-02 lock up valve IL200 LOCK UP VALVE

ASCO Red-Hat HC 8215G013 2-Way NC Fuel Gas Solenoid Valve 3/8" 120/60 AC 125 psi

R983031186 Rexroth 4WE6 D 6X/E G24N9K4 Hydraulic Directional Valve 24V DC

R983031149 Rexroth 4WE6 JA 6X/E G24N9K4 Hydraulic Directional Valve 24V DC

HYDROPA ZN 6 DB-P Modular Sandwich Hydraulic Pressure Relief Valve Max 100 bar

BURKERT Type 5411 Ident No. 447368 3/2-way solenoid valve G1/4 24V DC 10 bar

PARKER Domnick Hter K145AO 1μm Compressed Air Filter Element

Parker Lucifer 321K4106 2/2 NC G1/4 Pilot-Operated Brass Solenoid Valve no coil

ASCO HV2360221 Hot Water / Steam Solenoid Valve 3/4" NPT (ONLY VALVE)

GEFRAN KS-E-E-E-B02U-M-V 2130X000U00 Pressure Transducer 0..7 bar 4...20mA

ASCO SCE210D002 2/2 NC G1/2" General Service Brass Solenoid Valve 115/50 AC

PCS2406 100ZC Parker Kuroda 5/2-Way Solenoid Valve AC100/110 V Base Mtd.

Norgren Buschjost 8264000.9151 2/2 NC 1/4" NPT Solenoid Valve 24V DC 10 bar

5 pcs SMC SY5120-5G-01 Pneumatic Directional Valve 5/2 Way 1/8" 24V DC 100 psi

Asco Part No. 8210G015 General Service Solenoid Valve 3/8" 120/60 AC

 Asco Part No. 8210G015 General Service Solenoid Valve 3/8" 120/60 AC

Honeywell Lucifer U133K56951D-483270 Stainless Steel Solenoid Valve ATEX 24V DC

Asco 8320A17 NSN 4810004327137 Solenoid Valve 1/2 " 120/60 AC

MOBREY F104/1 Float Straight arm horizontal 316 SST rod length 750 mm 500 psi

ROTEX 24102 2-way NC Stainless Steel Solenoid Valve 1-1/2" BSP 230V AC 20 bar

Parker FPC S70 BM Electrical (S) Differential Pressure Indicator 7 bar

ALRE KR 80.008-8 Adjustable Temperature Control Switch 40...110 deg. C

NSN 4810010498837 ASCO DAX8314C49GM Dual voltage Solenoid Valve 240/440 AC 1/8"

IMI Norgren Super X X3044102 5/2-Way G1/8" Pilot / Spring Pneumatic Valve